Discovery of three new transiting hot Jupiters: WASP-161 b, WASP-163 b and WASP-170 b

K. Barkaoui, A. Burdanov, C. Hellier, M. Gillon, B. Smalley, P. F. L. Maxted, M. Lendl, A. H. M. J. Triaud, D. R. Anderson, J. McCormac, E. Jehin, Y. Almleaky, D. J. Armstrong, Z. Benkhaldoun, F. Bouchy, D. J. A. Brown, A. C. Cameron, A. Daassou, L. Delrez, E. DucrotE. Foxell, C. Murray, L. D. Nielsen, F. Pepe, D. Pollacco, F. J. Pozuelos, D. Queloz, D. Segransan, S. Udry, S. Thompson, R. G. West

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We present the discovery of three new transiting hot Jupiters by the WASP-South project, WASP-161 b, WASP-163 b, and WASP-170 b. Follow-up radial velocities obtained with the Euler/CORALIE spectrograph and transit light curves obtained with the TRAPPIST-North, TRAPPIST-South, SPECULOOS-South, NITES, and Euler telescopes have enabled us to determine the masses and radii for these transiting exoplanets. WASP-161 b completes an orbit around its V = 11.1 F6V-type host star in 5.406 days, and has a mass M p = 2.5 ± 0.2M Jup and radius R p = 1.14 ± 0.06 R Jup. WASP-163 b orbits around its host star (spectral type G8V and the magnitude V = 12.5) every 1.609 days, and has a mass of M P = 1.9 ± 0.2 M Jup and a radius of R p = 1.2 ± 0.1 R Jup. WASP-170 b has a mass of 1.7 ± 0.2 M Jup and a radius of 1.14 ± 0.09 R Jup and is on a 2.344 day orbit around a G1V-type star of magnitude V = 12.8. Given their irradiations (~109 erg s−1 cm−2) and masses, the three new planets' sizes are in good agreement with classical models of irradiated giant planets.
Original languageEnglish
Article number43
Number of pages10
JournalThe Astronomical Journal
Issue number2
Publication statusPublished - 11 Jan 2019

Bibliographical note

14 pages, 7 figures, Accepted for publication in Astronomical Journal


  • astro-ph.EP
  • planetary systems
  • techniques: photometric
  • techniques: radial velocities
  • techniques: spectroscopic


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